Zero Carbon, Net Zero and Passivhaus are all standards/targets that designers can strive to achieve, some more stringently measured than others. Engineers and contractors give us the benefit of their experience and expertise. Professor Pieter de Wilde from the University and CIBSE, and Kate Fry, Principal Engineer from SDS, explain the challenges. Andrew Ash from Kier Construction talks us through the trials of building the first Passivhaus leisure centre in the world currently under construction, just up the road in Exeter.

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